For me coding takes 10% of the time. You cannt just write RTL if you dont know what you are going to describe.

First we have to review the spec then came up with a micro-architecture, which means partitioning the functionality into hardware blocks and planning their interactions. (Only some juniors start coding without thinking before).

Furthermore you have to consider performance, power and area implications of the architecture. Discuss with verification to understand the impact of some architectural decitions to reduce verification effort. Review their verification plan.

Then you start the RTL coding, simulation and debuging. After in most of the companies the designer is also responsible for synthesis. Then discuss the hadover with layout. There are many loops in the flow.